Polarizing light guide plate unit and backlight unit and display device employing the same

a technology of polarizing light guide plate and backlight unit, which is applied in the direction of optical light guide, instruments, optics, etc., can solve the problems of difficult to increase light utilization efficiency, low light utilization efficiency, and complicated fabrication of lgp b>1/b>, and achieve the effect of improving polarization performan

Inactive Publication Date: 2007-11-01
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0011]The present invention provides a polarizing light guide plate (LGP) unit with improved polarization performance and a backlight unit employing the polarizing LGP unit, and a display device employing the backlight unit.

Problems solved by technology

The low light utilization efficiency results from absorption of light in polarizers or color filters within an LCD.
However, due to the expense of a reflective polarizing film and the absence of a polarizing converting element, it is difficult to increase the light utilization efficiency.
Also, the prism sheet 10 is not integrated into the LGP 1, thus making fabrication of the LGP 1 complicated.

Method used

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  • Polarizing light guide plate unit and backlight unit and display device employing the same
  • Polarizing light guide plate unit and backlight unit and display device employing the same
  • Polarizing light guide plate unit and backlight unit and display device employing the same

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Embodiment Construction

[0024]A backlight unit and a display device employing the backlight unit according to exemplary embodiments of the present invention will now be described in detail with reference to accompanying drawings. The invention may, however, be embodied in many different forms and should not be construed as being limited to the exemplary embodiments set forth herein; rather, these exemplary embodiments are provided so that this disclosure will fully convey the concept of the invention to those skilled in the art. In the drawings, like reference numerals in the drawings denote like elements and the size of each element may be exaggerated for clarity and convenience.

[0025]FIG. 2 is a cross-sectional view of a polarizing light guide plate (LGP) unit 200 and a backlight unit 400 employing the polarizing LGP unit 200 according to an exemplary embodiment of the present invention. Referring to FIG. 2, the backlight unit 400 includes a light source 100 and the polarizing LGP unit 200 converting unp...

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Abstract

A polarizing light guide plate (LGP) unit, a backlight unit employing the polarizing LGP unit, and a display device employing the backlight unit are provided. The polarizing LGP unit includes: an LGP which guides light emitted by a light source; a collimator that is disposed above the LGP and including a plurality of reflective patterns, each pattern having an inclined surface that reflects light exiting the LGP in an upward direction; and a polarization separating layer, disposed between the plurality of reflective patterns and the LGP, which transmits light of a first polarization and reflects light of a second polarization orthogonal to the first polarization.

Description

CROSS-REFERENCE TO RELATED PATENT APPLICATIONS[0001]This application claims priority from Korean Patent Application No. 10-2006-0038333, filed on Apr. 27, 2006, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein in its entirety by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]Apparatuses consistent with the present invention relate to a polarizing light guide plate (LGP) unit with improved polarization performance and a backlight unit employing the polarizing LGP unit, and a display device employing the backlight unit.[0004]2. Description of the Related Art[0005]Flat panel displays are categorized into self-emissive displays that generate light themselves to produce an image and non-emissive displays that use light from an external light source to produce an image. A representative example of a non-emissive display is a liquid crystal display (LCD). An LCD needs a separate light source such as a backlight unit in or...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G02F1/1335
CPCG02B6/0056G02B6/0053G02F1/1335
Inventor HWANG, SEONG-MOYOU, JAE-HO
Owner SAMSUNG ELECTRONICS CO LTD
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